forked from GitHub/gf-core
63 lines
2.0 KiB
Haskell
63 lines
2.0 KiB
Haskell
----------------------------------------------------------------------
|
|
-- |
|
|
-- Module : CFtoGrammar
|
|
-- Maintainer : AR
|
|
-- Stability : (stable)
|
|
-- Portability : (portable)
|
|
--
|
|
-- > CVS $Date: 2005/04/21 16:21:09 $
|
|
-- > CVS $Author: bringert $
|
|
-- > CVS $Revision: 1.7 $
|
|
--
|
|
-- 26\/1\/2000 -- 18\/4 -- 24\/3\/2004
|
|
-----------------------------------------------------------------------------
|
|
|
|
module GF.CF.CFtoGrammar (cf2grammar) where
|
|
|
|
import GF.Infra.Ident
|
|
import GF.Grammar.Grammar
|
|
import qualified GF.Source.AbsGF as A
|
|
import qualified GF.Source.GrammarToSource as S
|
|
import GF.Grammar.Macros
|
|
|
|
import GF.CF.CF
|
|
import GF.CF.CFIdent
|
|
import GF.CF.PPrCF
|
|
|
|
import GF.Data.Operations
|
|
|
|
import Data.List (nub)
|
|
import Data.Char (isSpace)
|
|
|
|
cf2grammar :: CF -> [A.TopDef]
|
|
cf2grammar cf = concatMap S.trAnyDef (abs ++ conc) where
|
|
rules = rulesOfCF cf
|
|
abs = cats ++ funs
|
|
conc = lintypes ++ lins
|
|
cats = [(cat, AbsCat (yes []) (yes [])) |
|
|
cat <- nub (concat (map cf2cat rules))] ----notPredef cat
|
|
lintypes = [(cat, CncCat (yes defLinType) nope nope) | (cat,AbsCat _ _) <- cats]
|
|
(funs,lins) = unzip (map cf2rule rules)
|
|
|
|
cf2cat :: CFRule -> [Ident]
|
|
cf2cat (_,(cat, items)) = map cfCat2Ident $ cat : [c | CFNonterm c <- items]
|
|
|
|
cf2rule :: CFRule -> ((Ident,Info),(Ident,Info))
|
|
cf2rule (fun, (cat, items)) = (def,ldef) where
|
|
f = cfFun2Ident fun
|
|
def = (f, AbsFun (yes (mkProd (args', Cn (cfCat2Ident cat), []))) nope)
|
|
args0 = zip (map (mkIdent "x") [0..]) items
|
|
args = [(v, Cn (cfCat2Ident c)) | (v, CFNonterm c) <- args0]
|
|
args' = [(zIdent "_", Cn (cfCat2Ident c)) | (_, CFNonterm c) <- args0]
|
|
ldef = (f, CncFun
|
|
Nothing
|
|
(yes (mkAbs (map fst args)
|
|
(mkRecord (const theLinLabel) [foldconcat (map mkIt args0)])))
|
|
nope)
|
|
mkIt (v, CFNonterm _) = P (Vr v) theLinLabel
|
|
mkIt (_, CFTerm (RegAlts [a])) = K a
|
|
mkIt _ = K "" --- regexp not recognized in input CF ; use EBNF for this
|
|
foldconcat [] = K ""
|
|
foldconcat tt = foldr1 C tt
|
|
|